Polyether-Modified Silicone Composition for Stable Polyurethane Foam Premixes

The patent introduces a specific organic solvent as an intermediary substance to mediate between the polyether-modified silicone and water. This solvent prevents direct interaction that would cause hydrogel formation, thereby maintaining storage stability while preserving the surfactant's foam-stabilizing function. The solvent acts as a compatibility agent that bridges the hydrophobic silicone and hydrophilic water phases.

The patent modifies the chemical environment by changing the solvent parameters - specifically selecting an organic solvent with appropriate polarity and solubility characteristics. This parameter change prevents the phase separation and gelation that occur in water-based systems, allowing the polyether-modified silicone to remain stable in premix solutions while retaining its surfactant activity.

The patent extracts and removes the volatile organic solvent component from the system after the hydrosilylation reaction. By completely removing the solvent rather than leaving it in the system, the patent eliminates the need for slow vacuum stripping during production. The solvent-free system allows for faster processing while maintaining cell stability through the chemical structure of the polyether-modified silicone itself.

The patent performs the solvent removal action during the reaction process itself rather than as a subsequent slow vacuum stripping step. By integrating the solvent elimination into the hydrosilylation process, the patent achieves both complete solvent removal for cell stability and efficient production timing, eliminating the bottleneck of slow pressure reduction.

The patent uses a specifically selected organic solvent as an intermediary that provides good affinity with SiH group-containing organopolysiloxane. This intermediary solvent facilitates the hydrosilylation reaction by improving mixing and contact between reactants, thereby increasing reaction rate and selectivity while avoiding the need for vacuum stripping and maintaining production efficiency.

The patent optimizes the solvent parameters by selecting an organic solvent with appropriate boiling point, polarity, and chemical compatibility. This parameter optimization achieves the right balance: high enough boiling point to avoid excessive evaporation but low enough to allow efficient removal, while providing good solubility for the SiH-containing polysiloxane to prevent side reactions and maintain manufacturing precision.